https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78433
--- Comment #8 from Dominik Vogt <vogt at linux dot vnet.ibm.com> ---
This code from maybe_script_execute() writes past the allocated array bounds:
/* Construct an argument list for the shell. */
char *new_argv[argc + 1];
^^^^^^^^
new_argv[0] = (char *) _PATH_BSHELL;
new_argv[1] = (char *) file;
if (argc > 1)
memcpy (new_argv + 2, argv + 1, argc * sizeof(char *));
^^^^^ ^^^^^^
else
new_argv[2] = NULL;
^^^
Before the patch, Gcc often allocated several bytes more than necessary so that
many off-by-one bugs went unnoticed.
